A non-proton polar solvent Diethylene glycol dimethyl ether(DGDE) was used as a cosolvent in aqueous electrolyte, the strong binding of O lone pair electrons in the CO bond to Zn²⁺ enabled DGDE to participate in the first solvent sheath to reconstruct the Zn²⁺ solvation structure. Meanwhile, the adsorption of DGDE on the surface of zinc electrode and the steric hindrance effect of DGDE molecule induced the horizontal deposition of hexagonal Zn(002) crystal plane, suppressed the zinc dendrite growth, while formed a dense protective layer on the surface of the zinc electrode to avoid it from the corrosion by the electrolyte. The initial CE of Zn‖Cu semi-battery was increased from 77 % with pure ZnSO₄ electrolyte to 87 % with 0.1 M DGDE added at 0.5 mA cm⁻² and 1 mAh cm⁻², and the average CE at 1 mA cm⁻² and 1 mAh cm⁻² was maintained at 98.7 % during the long cycle. As cycled at 3C (1C = 308mAh g ⁻¹) in 0.1 M DGDE electrolyte, Zn‖ε-MnO₂ full battery demonstrated much slower discharge decay, after 580 cycles, the capacity retained 138mAh g ⁻¹, 3.5 times of the system of 1 M ZnSO₄. Adding trace DGDE to aqueous electrolyte can effectively improve CE and inhibit the zinc dendrite growth, not only maintains the low-cost, quick assembly advantages of aqueous zinc-ion battery, but also lays a foundation for its further application.

以非质子极性溶剂二甘醇二甲醚(DGDE)作为水系电解质中的共溶剂， CO键中的O孤对电子与Zn²⁺的强结合使DGDE参与第一溶剂鞘层重构Zn²⁺溶剂化结构。同时，DGDE在锌电极表面的吸附以及DGDE分子的空间位阻效应诱导了六方Zn(002)晶面的水平沉积，抑制了锌枝晶的生长，同时在锌电极表面形成了致密的保护层。锌电极避免被电解液腐蚀。Zn‖Cu半电池的初始CE从纯ZnSO ₄电解质的77%增加到添加0.1M DGDE时在0.5 mA cm^-2和1 mAh cm^-2下，并且在1 mA cm -2 时的平均CE²和1mAh cm^-2在长循环期间保持在98.7%。在0.1 M DGDE电解质中^-1循环时 ₂全电池表现出更慢的放电衰减，580次循环后，容量保留为138mAh g ^-1，是系统的3.5倍。 1 M ZnSO₄。在水系电解液中添加微量DGDE可以有效提高CE并抑制锌枝晶生长，不仅保持了水系锌离子电池低成本、快速组装的优势，而且为其进一步应用奠定了基础。